Non-linear effect of uniaxial pressure on superconductivity in CeCoIn5

TL;DR

This study investigates how uniaxial pressure affects superconductivity in CeCoIn5, revealing a non-linear relationship with a maximum Tc near 2 kbar and significant broadening of the transition.

Contribution

It provides new insights into the pressure dependence of Tc in CeCoIn5, highlighting a non-linear behavior and transition broadening under uniaxial pressure.

Findings

Tc shows a non-linear dependence on pressure with a maximum near 2 kbar

Superconducting transition broadens significantly with increasing pressure

Tc decreases as the material approaches three-dimensional behavior

Abstract

We study single-crystal CeCoIn5 with uniaxial pressure up to 3.97 kbar applied along the c-axis. We find a non-linear dependence of the superconducting transition temperature Tc on pressure, with a maximum close to 2 kbar. The transition also broadens significantly as pressure increases. We discuss the temperature dependence in terms of the general trend that Tc decreases in anisotropic heavy-fermion compounds as they move towards three-dimensional behavior.